magento-test/app/code/Magento/User/Test/Mftf/ActionGroup/AdminFindUserOnLockedUsersGridActionGroup.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->
<actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
    <actionGroup name="AdminFindUserOnLockedUsersGridActionGroup">
        <arguments>
            <argument name="user" type="entity" />
        </arguments>

        <click selector="{{AdminLockedUsersGridSection.resetButton}}" stepKey="resetFilters" />
        <waitForPageLoad stepKey="waitForPageToLoadAfterFilterReset"/>
        <fillField selector="{{AdminLockedUsersGridSection.usernameField}}" userInput="{{user.username}}" stepKey="fillSearchUserNameFilter"/>
        <click selector="{{AdminLockedUsersGridSection.searchButton}}" stepKey="clickSearch" />
        <waitForPageLoad stepKey="waitForGridToLoad"/>
    </actionGroup>
</actionGroups>